Particles trapped in the evanescent field of an ultrathin optical fibre interact over very long distances via multiple scattering of the fibre-guided fields. In ultrathin fibres that support higher order modes, these interactions are stronger and exhibit qualitatively new behaviour due to the coupling of different fibre modes, which have different propagation wave-vectors, by the particles. Her...

We present new results on the optical link for the pixel detector of the ATLAS experiment. An optical package of novel design has been developed for the opto-link. The design is based on a simple connector-type concept and is made of radiation-hard material. The receiver (DORIC) and transmitter (VDC) chips have been designed. The prototype results using the 0.8 and 0.25 μm technologies are pres...

OBJECTIVE To evaluate the relationship between age and peripapillary retinal nerve fibre layer thickness in healthy Chinese subjects. DESIGN Cross-sectional study. SETTING Regional hospital, Hong Kong. PARTICIPANTS Healthy volunteers (n=218) of Chinese ethnicity with spherical equivalent of -6 to +4 dioptres were recruited for study from October 2001 to March 2003. Ocular examination was ...

A laser-assisted tuning method of whispering gallery modes (WGMs) in a cylindrical microresonator based on magnetic-fluids-infiltrated microstructured optical fibres (MFIMOFs, where MF and MOF respectively refer to magnetic fluid and microstructured optical fibre) is proposed, experimentally demonstrated and theoretically analysed in detail. The MFIMOF is prepared by infiltrating the air-hole a...

We demonstrate for the first time reconfigurability of optical signals within advanced laminated composite. The approach employs an ultra-thin planar circuit, embedded glass fibre reinforced polymer (GFRP) that switches input though Ohmic heating. This advance highlights new opportunities composites, enabling data transmission redundancy and a consideration branching architectures.